Milling head attachment for metalworking machines



Sept. 25, 1945. c. E.`sKE| ToN Y 2,385,735 v MILLING HEAD ATTACHMENT FORMETALWORKING MACHINES SePt- 25, 1945 c. E. sKELToN 2,385,735

MILLING HEAD ATTACHMENT FOR METALWORKING MACHINES Filed Apri1'24`. 19432 sheets-sheet `Patented Sept. 25, 1945 2,385,735 l 3.- I a".MLLINdHEADATTAcHMEN'r noiaimrrfAL'- 1 wWORKING, MACHINES j CharlesEaSkeltonj- Syracuse'gf-NI ".Application April 24, 19,43;Steria-1'ii4'gscv ni zrclaiins. lonen- 171 f1-S0 the.; ofrvtl-rel-spindle cl2', that 'is, vertical .whenthe spindle-fisyertical..Themotionofthe ...shaft is transferredto- .the spindle Athrough.v a

This invention has for its object a milling head attachmentfonmetalworking machines, as shapers, planers, profiling machines, etc. having atraveling table and particularly milling machines.

The invention particularly has for its object such an attachment inwhich the spindle carrying the tool and the motor for turning thespindle are so mounted relative to each other on the overhanging arm orshaft of the machine as to eliminate or reduce vibration to a minimum.

The invention consists in the novel features and in the combinations andconstructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figure 1 is a vertical sectional view of the attachment, the contiguousportion of the milling machine being also shown.

Figure 2 isa sectional view taken approximate- 1y on the plane of line2-2, Figure l, parts being omitted.

Figure 3 is a plan view of parts seen in Figure 1.

Figure 4 is a fragmentary view, partly in section, of parts seen inFigure 3.

I designates a portion of a milling machine; 2 the traveling work table,and 3 the Work thereon. 4 designates the overhanging arm of the millingmachine. The milling machine construction per se forms no part of thisinvention. The table 2 may be actuated in any suitable manner and alsothe overhanging arm 4 is suitably mounted in a carriage 5 to havevertical adjusting movement relative to the table of the millingmachine. l

The attachment comprises a spindle support as a tube or elongated hub 1having bearing 8 extending laterally from the hub 'I for mounting on theoverhanging arm 4 and a bracket y9 extending laterally at one side ofthe tubular support 4 and the bearing V8 for carrying a motor I0. Thebearing 8 is clamped in any suitable manner on the overhanging arm 4, asby clamping screws II, which serve to tighten the bearing 8, which issplit, on the overhanging arm `4 in any radial position out of theVertical relative to the overhanging arm 4. I2 designates the spindlejournalled in suitable bearings, as I3, in the support 1, this spindleextending above the upper end of the support and carrying a chuck I4 atits lower end for holding the tool I5.

The motor is arranged 'with its shaft I 6 parallel pinion Il mounted onthe motor'shaft'a gear I8 meshing with the pinion a'nd mounted on theshaft I9 having a cone of pulleys 20 thereon and a belt 2| selectivelyengaged with any one of the pulleys of the cone 20 and with acorresponding pulley of a complemental cone 22 mounted on the upper endof the spindle. The shaft I9 on which the gear I8 is mounted is suitablymounted on a carrier 23 mounted at one end on a hub 24 on a casing ofthe motor I0 and extending radially therefrom, this carrier 23 having asluiting movement about the axis of the shaft I6 or about the hub 24 totighten or loosen the belt for the purpose of shifting the belt from oneset of pulleys of the cones to another. The carrier is held in itsadjusted position by a link 26 pivoted at one end at 21 to the support 4or a segmental collar 28 mounted on the upper end of the support and atits other end at 29 to the carrier 23, the link consisting of twosections, which are connected together, so as to be extended orshortened by a turnbuckle 30. One end of the link, as the end 29 isformed Iwith a slot 3| for coupling with a clamping screw 32 on thecarrier 2 3. To shift the belt, the screw 32 is loosened and the link 26uncoupled from the carrier, the belt shifted and the carrier then movedoutwardly far enough to tighten the belt satisfactorily, the link isthen swung back into coupling engagement with the clamping screw 32 andthe screw 32 tightened. The turn-buckle is used for the purpose ofadjusting the belt to the proper tension.

As here shown, the carrier 23 is adapted to the hub 24 of the motor byan adapter ring 34 enclosing the hub 24 and having an inturned flange 35lapping the outer end of the hub 24. This ange is secured to the hub 24as by clamping screws 36. The clamping screws also extend through anannular plate 3l overlying the flange 35 and overhanging the sameforming an annular groove at 38 for receiving an annular internal flange39 on the carrier. During the shifting of the carrier 23 about the axisof the motor shaft I6, the flange 39 works in the groove 38.

This adapter is a convenient means for adjustably mounting the gear'carrier 23 on the hub of the motor v lOwing to the relative arrangementof the spindle or the support and the motor, that is, with the motor atone side of the spindle and the spindle support, there is a minimum ofvibration, or in other Words, owing to the relative arrangement of thespindle support and the motor Y Ysupport and means extending laterallyfrom the to the overhanging arm 4, vibration is reduced to a minimum andthe vibration of the tool does not re-act on the motor.

W'hatI claim is: 1; A milling head attachment for metal Working machinesincluding a bodyhaving a spindle' ally from between the ends thereof forsupport- Y ing a motor, a tool spindle journalled in the sup- 15 ion',and a shaft therefor mounted in the carrier,

port, a motor mounted on the bracket with its l shaft parallel to theaxis of the spindle,` a carn rier mountedY on the motor casing andhaving a rocking movement about the axis of the motor 1 shaft, a pinionmounted on the motor shaftwith'- in the carrier, a gear meshing with thepinion,

2,385,735 f'" -f v f2. A milling head attachment for metal workingmachines including a body having a spindle intermediate portion of thesupport for attach- 5 ment to the overhanging arm of the metal WorkingYmachine, and also a bracket extending laterally from between the endsthereof for supporting a motor, a tool spindle journalled in the Ysupport, a motor mountedl onpthe bracket with 10' its shaft-.parallel tothe axis ,of the spindle, a

carrier mounted on the motor'casing and having a rocking movement aboutthe axis of the motor shaft, a pinion mounted on the motor shaft withinthe carrier, a gear meshing with the pinthe spindle extending above thesupport, pulley and belt means between the last shaft and the upper endof the spindle, and adjustable means for holding the carrier frompivotal shifting 20 movement rabout the axis of the motor shaft.: and ashaft therefor mounted in the carrier, the v spindle extending above thesupport; pulley and belt means between the lastshaft and the upper y endof the spindle. Y j

CHARLES E. sKELToN; Y

